mirror of
https://github.com/minetest/minetest.git
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265 lines
5.7 KiB
C++
265 lines
5.7 KiB
C++
/*
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Minetest
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Copyright (C) 2010-2013 celeron55, Perttu Ahola <celeron55@gmail.com>
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation; either version 2.1 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License along
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with this program; if not, write to the Free Software Foundation, Inc.,
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51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#include "nodemetadata.h"
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#include "exceptions.h"
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#include "gamedef.h"
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#include "inventory.h"
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#include "irrlicht_changes/printing.h"
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#include "log.h"
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#include "debug.h"
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#include "util/serialize.h"
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#include "constants.h" // MAP_BLOCKSIZE
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#include <sstream>
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/*
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NodeMetadata
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*/
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NodeMetadata::NodeMetadata(IItemDefManager *item_def_mgr):
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m_inventory(new Inventory(item_def_mgr))
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{}
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NodeMetadata::~NodeMetadata()
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{
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delete m_inventory;
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}
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void NodeMetadata::serialize(std::ostream &os, u8 version, bool disk) const
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{
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int num_vars = disk ? m_stringvars.size() : countNonPrivate();
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writeU32(os, num_vars);
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for (const auto &sv : m_stringvars) {
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bool priv = isPrivate(sv.first);
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if (!disk && priv)
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continue;
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os << serializeString16(sv.first);
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os << serializeString32(sv.second);
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if (version >= 2)
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writeU8(os, (priv) ? 1 : 0);
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}
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m_inventory->serialize(os);
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}
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void NodeMetadata::deSerialize(std::istream &is, u8 version)
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{
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clear();
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int num_vars = readU32(is);
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for(int i=0; i<num_vars; i++){
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std::string name = deSerializeString16(is);
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std::string var = deSerializeString32(is);
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m_stringvars[name] = var;
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if (version >= 2) {
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if (readU8(is) == 1)
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markPrivate(name, true);
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}
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}
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m_inventory->deSerialize(is);
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}
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void NodeMetadata::clear()
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{
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SimpleMetadata::clear();
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m_privatevars.clear();
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m_inventory->clear();
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}
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bool NodeMetadata::empty() const
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{
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return SimpleMetadata::empty() && m_inventory->getLists().empty();
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}
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void NodeMetadata::markPrivate(const std::string &name, bool set)
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{
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if (set)
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m_privatevars.insert(name);
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else
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m_privatevars.erase(name);
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}
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int NodeMetadata::countNonPrivate() const
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{
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// m_privatevars can contain names not actually present
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// DON'T: return m_stringvars.size() - m_privatevars.size();
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int n = 0;
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for (const auto &sv : m_stringvars) {
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if (!isPrivate(sv.first))
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n++;
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}
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return n;
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}
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/*
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NodeMetadataList
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*/
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void NodeMetadataList::serialize(std::ostream &os, u8 blockver, bool disk,
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bool absolute_pos, bool include_empty) const
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{
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/*
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Version 0 is a placeholder for "nothing to see here; go away."
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*/
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u16 count = include_empty ? m_data.size() : countNonEmpty();
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if (count == 0) {
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writeU8(os, 0); // version
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return;
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}
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u8 version = (blockver > 27) ? 2 : 1;
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writeU8(os, version);
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writeU16(os, count);
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for (NodeMetadataMap::const_iterator
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i = m_data.begin();
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i != m_data.end(); ++i) {
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v3s16 p = i->first;
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NodeMetadata *data = i->second;
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if (!include_empty && data->empty())
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continue;
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if (absolute_pos) {
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writeS16(os, p.X);
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writeS16(os, p.Y);
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writeS16(os, p.Z);
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} else {
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// Serialize positions within a mapblock
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u16 p16 = (p.Z * MAP_BLOCKSIZE + p.Y) * MAP_BLOCKSIZE + p.X;
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writeU16(os, p16);
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}
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data->serialize(os, version, disk);
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}
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}
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void NodeMetadataList::deSerialize(std::istream &is,
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IItemDefManager *item_def_mgr, bool absolute_pos)
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{
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clear();
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u8 version = readU8(is);
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if (version == 0) {
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// Nothing
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return;
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}
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if (version > 2) {
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std::string err_str = std::string(FUNCTION_NAME)
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+ ": version " + itos(version) + " not supported";
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infostream << err_str << std::endl;
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throw SerializationError(err_str);
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}
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u16 count = readU16(is);
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for (u16 i = 0; i < count; i++) {
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v3s16 p;
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if (absolute_pos) {
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p.X = readS16(is);
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p.Y = readS16(is);
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p.Z = readS16(is);
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} else {
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u16 p16 = readU16(is);
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p.X = p16 & (MAP_BLOCKSIZE - 1);
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p16 /= MAP_BLOCKSIZE;
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p.Y = p16 & (MAP_BLOCKSIZE - 1);
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p16 /= MAP_BLOCKSIZE;
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p.Z = p16;
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}
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if (m_data.find(p) != m_data.end()) {
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warningstream << "NodeMetadataList::deSerialize(): "
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<< "already set data at position " << p
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<< ": Ignoring." << std::endl;
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continue;
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}
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NodeMetadata *data = new NodeMetadata(item_def_mgr);
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data->deSerialize(is, version);
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m_data[p] = data;
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}
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}
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NodeMetadataList::~NodeMetadataList()
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{
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clear();
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}
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std::vector<v3s16> NodeMetadataList::getAllKeys()
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{
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std::vector<v3s16> keys;
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keys.reserve(m_data.size());
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for (const auto &it : m_data)
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keys.push_back(it.first);
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return keys;
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}
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NodeMetadata *NodeMetadataList::get(v3s16 p)
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{
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NodeMetadataMap::const_iterator n = m_data.find(p);
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if (n == m_data.end())
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return nullptr;
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return n->second;
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}
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void NodeMetadataList::remove(v3s16 p)
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{
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NodeMetadata *olddata = get(p);
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if (olddata) {
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if (m_is_metadata_owner) {
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// clearing can throw an exception due to the invlist resize lock,
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// which we don't want to happen in the noexcept destructor
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// => call clear before
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olddata->clear();
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delete olddata;
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}
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m_data.erase(p);
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}
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}
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void NodeMetadataList::set(v3s16 p, NodeMetadata *d)
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{
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remove(p);
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m_data.emplace(p, d);
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}
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void NodeMetadataList::clear()
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{
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if (m_is_metadata_owner) {
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NodeMetadataMap::const_iterator it;
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for (it = m_data.begin(); it != m_data.end(); ++it)
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delete it->second;
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}
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m_data.clear();
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}
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int NodeMetadataList::countNonEmpty() const
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{
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int n = 0;
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for (const auto &it : m_data) {
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if (!it.second->empty())
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n++;
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}
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return n;
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}
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